<template>
  <el-container class="home_contianer">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../../public/纸飞机icon.png" alt="" />
        <span>电商管理后台系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle_button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#304156"
          text-color="#fff"
          active-text-color="#ffd04b"
          border="0px"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <i :class="iconObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主题区域 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      // 储存左侧菜单icon图标
      iconObj: {
        125: 'iconfont icon-Customermanagement',
        103: 'iconfont icon-product',
        101: 'iconfont icon-cart-full',
        102: 'iconfont icon-order',
        145: 'iconfont icon-tradingvolume'
      },
      // 是否折叠菜单
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      // 退出功能,先清空token,然后定向到login页面
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$massage.error(res.meta.msg)
      }
      this.menuList = res.data
    },
    // 点击按钮,切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
.el-header {
  background-color: #373c41;
  display: flex;
  justify-content: space-between;
  padding-left: 15px;
  align-items: center;
  color: #fff;
  font-size: 20px;
  div {
    display: flex; // 弹性布局
    align-items: center; // 让盒子内部居中对齐
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #304156;
}
.el-main {
  background-color: #eaedf1;
}
.home_contianer {
  height: 100%;
}
.iconfont {
  margin-right: 10px;
}
.toggle_button {
  background-color: #4a5064;
  font-size: 10px;
  text-align: center;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.2rem;
  cursor: pointer;
}
</style>
